Carburetor air control



Marqh 11,1930. w, P, cousmc', 1,749,873

CARBURETOR AIR CONTROL Filed Dec 2, 1926 Patented Mar. 11, 1930 WALTERP. COUSINO, OI DETROIT, IIGHIGAK cmuamon AIR comaor.

Application filed December 2, 1828. Serial No. 152,237.

This invention relates to the control of the air supply into'the fuel ofthe carburetor.

"This invention has utility when incorporated, in addition to andbetween the choke and throttle of a carburetor, to be controlled by thestarter.

Referring to the drawings:

Fig. 1 is a fragmentary vlew ofan embodiment of the invention inconnection with an internal combustion motor propelled vehicle; Fig. 2is a view on an enlarged scale of the A device with its wiringconnections shown diagrammatically a Fig. 3 is a section on the lineIIIIII Fig. 2; and r Fig. 4 is a section on the line IV--1V Fig. 2. Thevehicle is shown as having foot board 1 with push starter switch 2 forconnecting line 3 from battery 4 to line 5 extending to starting motor 6for actuating internal combustion engine 7 herein shown as of the piston and cylinder type, thereby acting through intake manifold 8 pastthrottle 9 or inducing draft or suction upon carburetor 1O having a fuelsupply or intake 11.

The motor 6 has therefrom line 12 to ground to complete circuit withline 13 to ground from the opposite side of the secone dary battery 4.Throttle 9, as provided with arm 14, has connection 15 therefromextending for convenient operation by the driver of the vehicle. Aircleaner 16- is shown as mounted. on air supply duct 17 extending pastchoke 18 to chamber 19' of the carburetor 10 below which isreservoir 20having enveloping electric coil 21 connectible b line 22 and switch 23,adjacent the driver 0 the vehicle, to permit turning of current intothis coil 21 so that this chamber 20 serves as a heater for vaporizingany liquid fuel which may not be carried up past the throttle 9, inwhich liquid state it settles back down into the carburetor 10 to flowinto this chamber 20. a In this invention, this chamber 20 of the farmeror heater device for the carburetor has air connection thereto shown asembodying L-fitting 24 with depending tube 25 therefrom. This tube 25 ispreferably non-magneticor not of a character to form a per- .foot ofithe switch 2, thus opening the circuit manent magnet. It has solenoidwinding or coil 26 thereabout' laced in circuit by switch 2 in parallelwith the starting motor 6 b line 27. This tube 25 as connected with thetting or L 24 has shoulder or seat 28 at chamber 29 in which isdisposediron or steel ball- 30 precluded from lodging in the fitting 2dby guard wire 31.

In operation, the driver of the vehicle may open the throttle 9 andclose the choke 18 provided with arm 33 and manually controllableextension 34 extending to a location convenient for operation by thedriver. The driver may then step on the starter switch 2 to causereciprocating engine 7 to act as a pump in developing suction in thecarburetor 10 for drawing liquid fuel, as gasoline, from float chamber35. as supplied by line 36.

At this condition for starting with the throttle open and the chokeclosed there is suction to such extent developed in the carburetor 10 asto pull a volume of the liquid fuel into the carburetor 10. The steppingon the starter switch 2 is generally for a brief interval, while thedriver of the vehicle is prone to leave the choke closed for a period oftime until the motor seems to warm up. This develops a flooded conditionin the carburetor, especially acute when the starter switch 2 is opened.

This difiiculty is automatically eliminated hereunder by-the device ofthis disclosure. During the operating of the starter by closing theswitch 2, the solenoid coil 26 is energized to increase the gravityholding action or seating of the ball 30 as thus magnetized.

After suction becomes excessive in the carburetor 10 the design of thecoil 26 is such that flooding of the carburetor may be avoided by theinflow of air through the tube 25 and L-fitting 24 into the reservoir 20to the carburetor 10. This will check the flooding tendency of the fuelintake as well as supply air for combustion of such fuel in the motor 7.When the driver of the vehicle takes his of the starting motor 6 to stopsuch motor from being operated by the storage battery 4, the coil 26 isdeener zed and there is but a very much reduced ho 'ng action forretaining the ball 30 seated in closing ofi air supply by way of thetube 25. Accordingly notwithstanding that the choke 18 may still' be'closed, there is retention of a degree of suction for fuel intake intothe carburetor which, when suificient to unseat the ball 30,

provides for combustion supporting air sup ply to mingle with the fumesof the flood of gasoline or fuel which may have condensed and settledinto the chamber 20. Even after switch 23 be opened, this device willoperate as an auxiliary air supply for assisting in starting andimproving starting conditions,

- especially in cold weather. The opened devlce may coact in runningconditions of the motor as an auxiliary air supply for assisting in morecomplete combustion of the fuel. With the choke open there is materiallygreater difiicultyin unseat-ing the-ball 30 for such auxiliary airsupply even though only temporarily magnetic.

This device is of material value in avoiding difiiculty from floodingthe carburetor in starting, as well as improving cold weather startingespecially in the winter season.

In the event it is desired to minimize or avoid chatter and not use aspring on the ball 7 30, the sleeve 25 may be of magnetizable material,say weakly permanent. In such event,

especially, it is preferable that the fitting24= be non-magnetizable. 7

What is claimed and it is desired to secure by Letters Patent is:

-1. A carburetor having an air supply a normally closed closure.therefor operable by motor suction draft in the carburetor, and asolenoid acting upon said closure for. resisting opening thereof.

2. A carburetor having an air supply duct,

a magnetizable ball closure for the duct, and a coil about said ductforacting upon said ball as an armature for affecting closing of said duct.

'3. In combination, an internal combustion motor, a carburetor for suppling fuel thereto having a normal air inta e and an auxiliary air intake,said auxiliary intake being provided with a normally closed clo- 1 sureopenable by suction through the carburetor, a switch, and a solenoidenergized through said switch operable for maintaining the closure inauxiliary intake closing position'coincident with motor starting.

slgnature. USING.-

In witness whereof -I .aifix m -WALTER P. C6

